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Most people do not understand the knowledge points of this article "how to generate nine-grid photos of Python", so the editor summarizes the following contents, detailed contents, clear steps, and has a certain reference value. I hope you can get something after reading this article. Let's take a look at this "how to generate nine-grid photos of Python" article.

First, the effect picture of the ninth palace in the moments. 2. The basic operation of the picture.

Open the picture to be processed

Judge whether the open picture is square or not

If it is a square, divide it into nine equal parts. If it is not a square, fill it with white first, and then divide it into nine equal parts.

Save the processed picture

The first step is to install the Pillow module.

Pip install pillow

1. Deal with pictures

In Pillow, use the Image submodule. The Image.open function returns an image object with the following code:

From PIL import Image# reads the picture img = Image.open ('lbxx.jpg')

The Pillow module is the python3 version of the PIL module, so we use the following statement when we import the module:

From PIL import Image

2. Intercept pictures

In the Image object, there is a crop method that cuts the picture. It receives a box parameter that represents the area to be intercepted. The coordinate system in the picture is based on the upper left corner.

Let's look at the specific code:

From PIL import Image# reads the picture img = Image.open ('lbxx.jpg') # intercepts the (0,0,300,300) area of the picture box = img.crop ((0,0,300,300)) # shows the intercepted area box.show ()

3. Save the processed pictures

Saving the image is very simple. All we need to do is call the save method of img, as shown in the following code:

From PIL import Imageimg = Image.open ('lbxx.jpg') box = img.crop ((0,0,300,300)) # Save picture box.save (' 1.jpg') 3. Generate Nine Miyagi grid pictures

Knowing the above operation, the following operation is nothing more than to intercept the nine areas of the picture and save it. The specific code is as follows:

Import osfrom PIL import Image# reads picture im = Image.open ('1kkx.jpg') # divide width and height by 3 Get the size of the cropped single picture width = im.size [0] / / 3height = im.size [1] / / 3 # coordinate of the upper left corner of the cropped picture start_x = 0start_y = 0 # used to name the picture im_name = 1 # cycle cropping picture for i in range (3): for j in range (3): # crop the picture and save crop = im.crop ((start_x, start_y, start_x+width) Start_y+height)) # determine whether if not os.path.exists ('imgs'): os.mkdir (' imgs') crop.save ('imgs/' + str (im_name) +' .jpg') # move the x axis of the upper left corner coordinates to the right start_x + = width im_name + = 1 # when first After the line is cut, x continues to crop from 0. Start_x = 0 # cut the second line start_y + = height above is the content of this article on "how Python generates Nine Palace Photos". I believe we all have a certain understanding. I hope the content shared by the editor will be helpful to you. If you want to know more about the relevant knowledge, please pay attention to the industry information channel.

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